Support of roofs in mines



Aug. 11, 1964 F COWLISHAW 1 3,143,862

SUPPORT .OF RobFs IN MINES 26 vSheets-sheaf. 1

Filed Aug. 10, 1959 M M? W K N m/ A tlorney;

Aug. 11, 1964 F. COWLISHAW SUPPORT OF ROOFS m MINES 26 Sheets-Sheet 2 Filed Aug. 10, 1959 T Qr In venlor FMIVK COWL/SHA W 5y JW Attorneys Ailg- 1964 F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES Filed Aug. 10, 1959 26 Sheets-Sheet 5 Inventor FRANK cows/14w Aug. 11, 1964 F. cowLlsHAw 3,143,852

SUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 6 Filed Aug. 10, 1959 TRAL SET 3 //\)/.7'ENS/FY 1 1 w amse NEUTRAL V7 357 j IIYITENSIFY In venlor FRA N K COWL/SHA W A ttorney Aug. 11, 1964 F. cowLlsHAw 3,143,862

SUPPORT OF ROOF'S IN MINES Filed Aug. 10, 1959 26 Sheets-Sheet 7 FAA/VK COWL/SAMW aymmgm ATTORNEYS 1964 i F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES Filed Aug. 10, 1959' 26 Sheets-Sheet 8 I noentor FRANK GOWL/SHAW aymQ/W A ttorneys Aug. 11, 1964 F. COWLISHAW SUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 9 Filed Aug. 10, 1959 1 n venlor FRA NK COWL/SHA W B pm A ttomeys Aug. '11, 1964 F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES Filed Aug. 10, 1959 26 Sheets-Sheet 1O l n ventor FRA NK COWL/SHAW A ttorne 31 Aug. 11, 1964 F. COWLISHAW 3,143,862

' SUPPORT OF ROOFS IN MINES lnvenlor FRANK COWL/SHAW A ttorn e315 Aug. 11, 1964 F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES Filed Aug. 10, 1959 2e Sheets-Sheet 12 I n ventor FRANK COWL/5HA W Bym Attorneys Aug. 11, 1964 F. COWLISHAW SUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 13 Filed Aug. 10, 1959 Inventor A Home FRANK COWL/5HAW Aug. 11, 1964 F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES Filed Aug. 10, 1959 26 Sheets-Sheet 14 FIG. 26.

Inventor FRANK COWUSHAW A tlorneys 7 Filed Aug. 10, 1959 Ailg- 1 1964 F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 1 5 l n venlor FRANK COWL/SHA W Attorneys Afig. 11, 1964 F. cowLlsHAw SUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 16 Filed Aug. 10, 1959 r M m H e m u L In W c @w wt K M .J m m9 Q: w R9 ME 2E E 3 a Q 2 22 m m2 5 X I 0 U\b\ 1T L I I I I l A ttornex Aug. 11, 1964 F. COWLISHAW 3,143,862

SUPPORT OF ROOFS IN MINES Filed Aug. 10, 1959 I 26 Sheets-Sheet 17 A ttomeyg Aug; 11, 1964 F. COWLISHAW SUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 18 Filed Aug. 10, 1959 lnventor FRANK COWL/SHAW fiymgimwz,

Attorneys Aug. 11, 1964 F. COWLISHAW vSUPPORT OF ROOFS IN MINES 26 Sheets-Sheet 19 Filed Aug. 10, 1959 I n ventor FRANK COWL/Sl-MW A Item e y; 

1. MINE ROOF SUPPORT MEANS COMPRISING A PAIR OF HYDRAULICALLY EXTENDABLE AND CONTRACTABLE SUPPORT UNITS EACH HAVING A PAIR OF SPACED HYDRAULICALLY EXTENDABLE AND CONTRACTABLE PROPS MOUNTED ON A COMMON BASE AND HAVING A COMMON HEAD, A HYDRAULICALLY OPERABLE CYLINDER AND RAM INTERCONNECTING THE TWO SUPPORT UNITS FOR ADVANCE OF EACH IN TURN IN SIDE-BY-SIDE RELATIONSHIP WHEN CONTRACTED USING THE OTHER SUPPORT UNIT IN EXTENDED ROOF SUPPORTING CONDITION AS A STATIONARY ABUTMENT, FIRST HYDRAULIC CONTROL MEANS ASSOCIATED WITH SAID UNIT FOR CONTROLLING SAID MOVEMENTS, A CANTILEVER ROOF GIRDER PROJECTING FROM AT LEAST ONE OF SAID ROOF BARS IN CONTINUATION THEREOF AND HAVING LOWER LATERALLY PROJECTING WEBS, AND AN AUXILIARY PROP OF HYDRAULICALLY EXTENDABLE AND CONTRACTABLE CONSTRUCTION COOPERATING WITH SAID CANTILEVER ROOF GIRDER, SAID AUXILIARY PROP COMPRISING A CYLINDER AND RAM DISPOSED UNDER SAID CANTILEVER ROOF GIRDER, AND A CHANNEL-SHAPED HEAD PIVOTALLY MOUNTED ON SAID CYLINDER AND RAM AND THROUGH WHICH SAID CANTILEVER ROOF GIRDER EXTENDS, SAID AUXILIARY PROP INCLUDING A TILTABLE PORTION PIVOTED WITH RELATION TO SAID HEAD, AND SAID HEAD BEING OF GREATER DEPTH 